LiftMaster 78LM Multi-Function Garage Door Wall Control User Instructions

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LiftMaster 78LM Multi-Function Garage Door Wall Control User Instructions



The door control is typically attached directly to the wall. For prewired installations (as in new home construction) it can be mounted to a standard single gang box.

  1. Disconnect power to the garage door opener.
  2.  Strip 1/4″ (6 mm) of insulation from one end of the bell wire and connect to the two screw terminals on the back of the door control as follows: red/white wire to 1 and white wire to 2.
  3. Remove the push button cover by gently prying off the top edge with a screwdriver. Fasten with 6ABx1-1/4″ self-tapping screws (standard installation) or 6-32×1″ machine screws (pre-wired installation) .
  4. Standard Installations ONLY Run bell wire up wall and across ceiling to motor unit. Use insulated staples to secure wire to wall and ceiling in several places. Do NOT pierce wire with a staple, this will create a short or open circuit.
  5.  Strip 7/16″ (11 mm) of insulation from the end of the bell wire.
  6.  Connect bell wire to terminals.
  7.  Reconnect power to the garage door opener.
  8.  Replace the cover by inserting the bottom tabs and snapping it into place. Test the wall control to ensure proper operation.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to
cause cancer or birth defects or other reproductive harm.




Door Control Push Button
Press to open or close the door. Press again to reverse the door during the closing cycle, or to stop the door while it is opening.

Light Feature
Press the Light button to switch the opener light on or off on for 4-1/2 minutes. Press the Light button to turn it off sooner. The Light button will not control the opener light when the door is in motion.

Lock Feature
Designed to prevent operation of the door from portable remote controls. However, the door will open and close from the Door Control push bar and from the Keylock and Keyless Entry accessories.


LiftMaster 78LM Multi-Function Garage Door Wall Control User Instructions


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